Improvement in bolt and rivet machines



1. C. GETZ.

Bolt and Rivet Machine. N0.167 `,522, Patented spt.7,1a75.

Ta-UTMOGRAPHEH. WASHINGTON, D C.

Mn/ewes, JM J JOSEPH O. GET-Z, OF PHILADELPHIA, PA., ASSIGN OR OFONE-HALF INTEREST TO A. O. DENIO, OF WILMINGTON,

DELAWARE; SAID GETZ AND DENIO ASSIGNORS OF PART INTEREST TO GEORGE G.LOBDELL, OF VILMINGTON,

DELAWARE IMPROVEMENT IN BOLT AND RIVET MACHINES.

Specification forming part of Letters Patent No. 167,522, datedSeptember 7, 1875; application iiled April 30, 1875.

To all 'whom it may concern:

Be it known that I, JOSEPH C. GETZ, of Philadelphia, Pennsylvania, haveinvented an Improved Bolt and Rivet Machine, of which the following is aspecification:

The object of my invention is to construct a substantial, effective, andcheap machine for heading rivet and bolt blanks, my invention havingespecial reference to mechanism for operating the slide which carriesthe heading-die, to the construction of and devices for operating thedie-plate, to the ready repairing; and adjustment of the severingmechanism, and to the maintenance of the dir-plate and its adjuncts in acool condition.

Figure is a plan view of my improved rivet and bolt heading machine;Fig. 2, a vertical section on the line l 2; Fig. 3, a transversevertical section on the line 3 4; and Fig. 4, an enlarged sectional planof part ofthe machine.

A is the substantial box-like frame, having opposite sides c c andopposite ends b b. In suitable bearings on the sides of the frame turnsthe driving-shaft B, on which is a cam or eccentric, d, for imparting aforward movement to a slide, D, adapted to guides e on the frame, Jtheslide being provided with an antifriction roller, f, against which thesaid cam d bears. The slide is retracted by two disks, E and E', havingeccentric anges h, the inner sides of which bear against pins i attachedto the slide. It should be understood that the caind and eccentrics hare so arranged in respect to each other and so formed that during theforward motion of the slide the flanges h are free from contact with thepins fi, and during the rearward movement of the slide the cam d is freefrom Contact with the roller f. Motion is communicated, through themedium of bevel-wheels, from the driving-shaft B to a shaft, F, adaptedto bearings m m projecting from the frame, and this shaft has a crank,G, connected, by a rod, K, to the outer end ot' the arm H, the inner endof which is made to embrace the circular die-plate I, which is hung to abolt, J, and is snugly7 confined by the same to the end b of the frame,but so that the plate can turn freely. The end of the lever H where itembraces the die-plate consists of two rings, a: and between these ringsis hung a springpawl, n, adapted to ratchet-teeth formed on the edge ofthe die-plate, the said teeth 'projecting between the two rings x x ofthe lever, so that the latter shall embrace the die-plate, one ring onone side and the other on the opposite side of the teeth, which thusmaintain the lever in its proper lateral position on the die-plate.

It may be remarked here that this plano' causing the lever to embracethe die-plate, which thus becomes the fulcrum of the lever, insuresgreater accuracy and truth in the movement of the lever, and enables itto perform its severe duty better than if it had its fulcruln outsidethe die-plate.

There are as many horizontal openings in the die-plate as there areratchet-teeth on the same, and into each opening is snugly fitted atubular die, q, of steel, the outer end of which is provided with acollar so adapted to a recess in the plate that the front end of the dieshall be in the same plane with the front face of the Y plate. To anopenin g in the end b of the frame is fitted a steel-receiving tube, w,which is secured to the frame by threaded studs y passing through lipson the tube, each stud being provided with two nuts, one on each side ofthe lip, so that the tube can be readily removed I and replaced and adjusted horizontally in the frame. The importance of this arrangement willbe understood when it is borne in mind that the heated bar of which thebolts or rivets have to be made is passed through this receivl I ing-tube and th rough oneof the tubesqotthe dieplate, and is severed bythe movement of the said tube q past the tube w when the die-plate ismoved bythe lever H. Hence the end of the tube w presents onecutting-edge and the end of each tube q another cutting-edge. As thereare twelve or more tubes, g, in the dieplate, the tube w has morecutting duty to perform, and hence will be more rapidly worn at thecutting end. lVhen the latter becomes blunt, however, the tube can bewithdrawn from the frame and the end ground prior to the reinsertion ofthe tube, which can be adjusted by the nuts of the screws y to aposition where, in conjunction with the tubes q, it will have the bestcutting eii'ect.

When the slide D, with its header t, is being retracted by the eccentricflanges of the disks E, the heated bar is passed through the tube fw andthrough that tube q of the dieplate which coincides with the said tubefw, after which the rod is severed by the movement ofthe die-plate,which carries the severed end of the rod to a position between adetachable steel plate, c., in the vend b of the frame, and the headert, which, being forced forward by the action ofthe cam d on the slide D,forms the head on the said severed rod, and the rivet or bolt blank thusformed is subsequentlyr forced from the tube q which contained it by arod, h, passing through the end b of the frame and jointed to one arm ofthe lever J, the other arm of which is connected to the slide D. Aspring-rod, i, serves to steady the die-plate I and to maintain the samein a proper position during the heading operation, but yields when thedie is moved by the action of the lever H and its pawl.

It will be seen on reference to Fig. 3 that a portion of the die-plate,as Well as of that portion of the lever which embraces the said plate,is contained within a trough, M, which is always maintained nearly fullof water, so as to counteract the evil effects of the undue heat whichwould otherwise be imparted to the said die-plate and lever.

I claim as my invention- 1. In a rivet or bolt heading machine, thecombination of the driving-shaft carrying a central cam or eccentric, d,and two eccentric flanged disks, E E', and the slide D, provided withpins i, against which the flan ges h h of -the said disks bear inretracting the slide, all

as and for the purpose set forth.

2. The combination of the cutting-tube fw, secured in a stationaryposition on the frame of the machine, and the die-plate I, provided witha series of detachable tubular dies, q, each extending completelythrough the plate, and having` a collar at the front end, between whichand the end of the tube w the bar is severed, all as set forth.

3. The die-plate I, having at the edge a central ratchet and a recess ateach side thereof, in combination. with a lever, H, carrying aspring-pawl, n, and having at the end rings x x, Iitting said recesses,all as set forth.

4. The removable and adjustable tube w, connected to the frame of themachine, substantially in the manner described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' JOSEPH C. GETZ.

Witnesses:

HUBERT HowsoN, HARRY SMITH.

